Steam-engine governor



(o Model.) 'I

H. C. CLAY. STEAM ENGUE GOVERNOR.

l Patented Sept. 24, 1.895.

mit# a l in il 2%. ,wg A

NIT-ED STATES 'PATENT Fries.

HARRY O. CLAY, Oli DAYTON, OHIO.

STEAlVi-ENGIN'E GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 546,728, dated September 24, 1895.

I Application filed T une 29, 1895. Serial No; 554,416. (No model.)

To all whom it may concern,.-

Be it known that l, HARRY C. CLAY, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Steam-Engine Governors; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

My invention relates to improvements in steam-engine governors of the automaticshaft type. common 'with swinging eccentric-governors in use; but some features are novel, as will be fully hereinafter described and claimed. The eccentric which gives motion to the engine-valve is suspended within a case tixedly attached to the engine-shaft, and the combination of parts forming the governor increases and diminishes the throw of the valve, and thereby regulates the motion of the engine.

The object of my invention is the construer tion of au automatic-shaft governor, which will prove eectual and highly sensitive, with a view to greater uniformityin the motion of the engine. The object is accomplished by the mechanism illustrated in the accompanying drawings, in which- Figure l is a back view of the governor, with the arms of the case and portions of the spiral springs cut away to exhibit more clearly the operative parts. Fig. 2 is a transverse sectional view on line a: w, Fig. l.

Like letters designate like parts in the two views.

The cylindrical case C is fixedly keyed to the engine-shaft and forms the support tothe several parts of the governor. Within the lugs W W of the case is suspended on the boltB the principal eccentric A. To the strap V of this eccentric is attached, in the usual manner, the valve-rod N, which connects said eccentric to the engine-valve, and through which the reciprocating movement is effected. The two parts of the eccentric-strap V V' are united, as usual, by bolts. The two heavy arms G are held on the arms C of the case by the The device has many features in bolts H. To the ears on the free ends are attached the'links J, which engage the ears of the auxiliary eccentric F by means ofthe pins T, which are heldin place by the setscrew U. There are two pairs of the spiral springs O O. These are hooked onto pins P P on both sides of the heavy arms or weights G, and the other ends are bound to grooved circular nuts,

`which are engaged by the tension-screws Q,

nected by the 4trunnion L to the principalv eccentric.

K is the bearing-plate, its front face being the arc of a circle and bears within the groove of the eccentric F,`the back part of which is curved, and central in this part is a semicircular bearing for the connecting-trunnion L. The rear eccentric-strap K is connected to the forward strap, as usual, and its inner surface corresponds to the outline of said bearing-plate and at its center is provided with a bearing for said trunnion, which is held between said parts. Said trunnion is provided with a plate, by which it is attached to the principal eccentric by the screws M. The two parts of the rear strap are separable, in order that any wear of the auxiliary eccentric or of the trunnion-bearing can be taken up by the bolts and their nuts S, which unite the two principal parts of the strap, thus tightening both bearings by the same adjustment. When it is desirable to give an opposite motion to the engine, the weighted arms are pivoted at C2 C2, the tensionscrews of the spiral springs are attached at C4 C4, and a reverse motion results. As the weighted arms are moved by the centrifugal force, the auxiliary eccentric is carried partially around on its bearing, which is central lto the engineshaft, and proportionately the principal eccentric is moved forward and backward in line with the valve-rod, and the reciprocating movement of the valve is thus determined. To make the operation as nearly isochronous as possible the centrifugal force of the arms must be slightly in excess of the tension of the spiral springs.

Having fully described my invention, what I claim, and desire to secure by Letters Patent, is-

I. In an engine-shaft governor the combination of the case rigidly attached to the engine shaft, the pivotal arm suspended within Said case, the principal eccentric held on the free end of said arm, the Weighted-arms pivotally suspended from said case, the tension springs uniting said case With said weightedarms, the auxiliary eccentric, the rear strap comprising two parts with bearings and united by links to said weighted arms, the trunnion held in bearings of said rear strap and uniting the tivo eccentrics, and the principal one having connection with the engine valve, substantially as described.

2. The combination of the auxiliary eccentric provided with the straps K K the latter provided with a central bearing, the inner bearing plate K, to engage the face of the eccentric, and provided with a like central bearing, the principal eccentric and the trunnion connecting the two, substantially as and for the purpose specified.

In testimony that I claim the foregoing as my own I afl-lx my signature in presence of two witnesses.

HARRY C. CLAY.

W'iinesses:

B. PICKERING, E. G. PICKERING. 

